On October 1st, the Phusion team released Passenger 3.0.0 RC1. Barring any major show stoppers, the next release will be 3.0.0 final. There's been lot of coverage on the benefits of Passenger 3.0, so you should get familiar and try it out.

Ruby Melee provides a simple way to share a code editor from directly inside of your browser. This could be used for simple pair programming or remote refactoring. On the back end, it uses Pusher, so you'll see immediately when someone else edits your code and it's even got a way to execute Ruby, immediately.

Aaron Gough just recently released Koi, a new programming language built on top of Ruby. Koi was developed to be a teaching tool, helping you to learn how to program a programming language. The source is written to be clean and understandable and it's all available over on GitHub.

If you're writing a desktop application in Ruby, then you'd probably like to work with the operating system's clipboard. But, OS X, Windows, and Linux all use different clipboard interfaces. So, the Clipboard gem by Jan Lelis provides a single interface to wrap them and make your copy / paste functionality simple and seamless.

Justin.tv just recently released some of their code back into the community. Specifically, they've extended James Pozdena's APNS gem and added Apple's push feedback API as well as made it more performant.

Yehuda Katz is battling back against the argument that Bundler is difficult, complex, unintuitive, ... insert your reason for not using it here ... with a recent blog post detailing why Bundler is simpler that what you're already doing, today. Also, this weekend brought an update to the library, bumping it up to 1.0.2.

For complex applications or simply for design tools, diagrams are often immensely helpful. And now, Rolf Timermans released Rails ERD, a gem which builds Entity-Relationship Diagrams automagically out of your Rails 3 application. So, if you're just getting up to speed on a new project, or simply want more graphical documentation, you should check it out.